Three killed, two injured crossing busy Philadelphia street

Family members react as they watch investigators at the scene of a fatal accident on Roosevelt Boulevard in Philadelphia Tuesday evening. Police are investigating whether cars may have been drag racing when a mother and two young sons were struck and killed attempting to cross the busy street. The woman's two other sons, ages 4 and 5, are in critical condition.Joseph Kaczmarek/AP Photo

Published July 18. 2013 12:01AM

Updated July 18. 2013 12:28AM

Family members react as they watch investigators at the scene of a fatal accident on Roosevelt Boulevard in Philadelphia Tuesday evening. Police are investigating whether cars may have been drag racing when a mother and two young sons were struck and killed attempting to cross the busy street. The woman's two other sons, ages 4 and 5, are in critical condition.